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# Copyright (c) 2020, Manfred Moitzi
# License: MIT License
from typing import List
import ezdxf
from ezdxf.math import Shape2d
from ezdxf.render.forms import square
from ezdxf.lldxf import const
DX = 11
SIZE = 10
def add_hatch(
msp,
external: List[Shape2d] = None,
*,
outermost: List[Shape2d] = None,
default: List[Shape2d] = None,
hatch_style=const.HATCH_STYLE_NESTED,
offset=(0, 0),
):
def add(path, flags: int, color: int, layer: str):
path.translate(offset)
hatch.paths.add_polyline_path(path.vertices, flags=flags)
msp.add_lwpolyline(
path.vertices,
close=True,
dxfattribs={"color": color, "layer": layer},
)
hatch = msp.add_hatch(2, dxfattribs={"layer": "HATCH"})
hatch.dxf.hatch_style = hatch_style
if external:
for path in external:
add(path.copy(), const.BOUNDARY_PATH_EXTERNAL, 1, "EXTERNAL-PATH")
if outermost:
for path in outermost:
add(path.copy(), const.BOUNDARY_PATH_OUTERMOST, 3, "OUTERMOST-PATH")
if default:
for path in default:
add(path.copy(), const.BOUNDARY_PATH_DEFAULT, 5, "DEFAULT-PATH")
def add_hatch_boundaries_test(msp, offset):
x, y = offset
external = Shape2d(square(SIZE))
outermost = Shape2d(square(SIZE - 2))
outermost.translate((1, 1))
default0 = Shape2d(square(SIZE - 4))
default0.translate((2, 2))
default1 = Shape2d(square(SIZE - 6))
default1.translate((3, 3))
add_hatch(
msp,
external=None,
outermost=None,
default=[external, outermost, default0, default1],
hatch_style=const.HATCH_STYLE_NESTED,
offset=offset,
)
add_hatch(
msp,
external=[default0, default1],
outermost=[external, outermost],
hatch_style=const.HATCH_STYLE_OUTERMOST,
offset=(x + DX, y),
)
add_hatch(
msp,
external=[external, outermost, default0, default1],
hatch_style=const.HATCH_STYLE_IGNORE,
offset=(x + DX + DX, y),
)
def add_hatch_boundaries_adjacent(msp, offset):
x, y = offset
external = Shape2d(square(SIZE))
outermost = Shape2d(square(SIZE - 2))
outermost.translate((1, 1))
default0 = Shape2d(square(2))
default0.translate((2, 2))
default1 = Shape2d(square(2))
default1.translate((6, 2))
add_hatch(
msp,
external=[external],
outermost=[outermost],
default=[default0, default1],
hatch_style=const.HATCH_STYLE_NESTED,
offset=offset,
)
add_hatch(
msp,
external=[external],
outermost=[outermost],
default=[default0, default1],
hatch_style=const.HATCH_STYLE_OUTERMOST,
offset=(x + DX, y),
)
add_hatch(
msp,
external=[external],
outermost=[outermost],
default=[default0, default1],
hatch_style=const.HATCH_STYLE_IGNORE,
offset=(x + DX + DX, y),
)
def add_hatch_boundaries_overlapping(msp, offset):
x, y = offset
external = Shape2d(square(SIZE))
outermost = Shape2d(square(SIZE - 2))
outermost.translate((1, 1))
default0 = Shape2d(square(3))
default0.translate((2, 2))
default1 = Shape2d(square(3))
default1.translate((4, 3))
add_hatch(
msp,
external=[external],
outermost=[outermost],
default=[default0, default1],
hatch_style=const.HATCH_STYLE_NESTED,
offset=offset,
)
add_hatch(
msp,
external=[external],
outermost=[outermost],
default=[default0, default1],
hatch_style=const.HATCH_STYLE_OUTERMOST,
offset=(x + DX, y),
)
add_hatch(
msp,
external=[external],
outermost=[outermost],
default=[default0, default1],
hatch_style=const.HATCH_STYLE_IGNORE,
offset=(x + DX + DX, y),
)
def add_hatch_boundaries_nested(msp, offset):
x, y = offset
external = Shape2d(square(SIZE))
outermost = Shape2d(square(SIZE - 2))
outermost.translate((1, 1))
default0 = Shape2d(square(SIZE - 4))
default0.translate((2, 2))
default1 = Shape2d(square(SIZE - 6))
default1.translate((3, 3))
add_hatch(
msp,
[external],
outermost=[outermost],
default=[default0, default1],
hatch_style=const.HATCH_STYLE_NESTED,
offset=offset,
)
add_hatch(
msp,
[external],
outermost=[outermost],
default=[default0, default1],
hatch_style=const.HATCH_STYLE_OUTERMOST,
offset=(x + DX, y),
)
add_hatch(
msp,
[external],
outermost=[outermost],
default=[default0, default1],
hatch_style=const.HATCH_STYLE_IGNORE,
offset=(x + DX + DX, y),
)
if __name__ == "__main__":
doc = ezdxf.new()
add_hatch_boundaries_nested(doc.modelspace(), offset=(0, 0))
add_hatch_boundaries_adjacent(doc.modelspace(), offset=(0, 11))
add_hatch_boundaries_overlapping(doc.modelspace(), offset=(0, 22))
doc.set_modelspace_vport(40, (15, 20))
doc.saveas("hatch_boundaries.dxf")
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